Improvement in stove-pipe dampers



PATENT OFFICE.

WILLIAM J. KEEP, OF TROY, NEW YORK.

IMPROVEMENT IN STOVE-PIPE DAMPERS.

Specification forming part of Letters Patent No. 121,877, dated December 12, 1871.

in the county of Rensselaer and in the State of New York, have invented certain new and useful Improvements in Stove-Pipe Dampers; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing making a part of this specification, in which- Figure l is a front elevation of my improved device. Fig. 2 is a plan view of the upper side of the same. Fig. 3 is a central longitudinal section on the line a a: of Fig. 2. Fig. 4 is a similar section on the line z z of Figs. l and 2. Fig. 5 is a plan view of the inner side of the central portion of the register. Fig. 6 is an edge View of the same, and Fig. 7 is a plan view of the upper side of a modification of my entire device.

Letters of like name and kind refer to like parts in each of the figures.

My in ventiou is an improvement in combined dampers and ventilating registers; and itconsists principally in a register-collar fitted into its opening from within the pipe, substantially as and for the purpose hereinafter specified. It consists,fi1rther,in a registercollar held in position by means ofthe outward pressure ofthe damper, substantially as is hereinafter shown and described. I t consists, further, in a register having a central hub or boss, which fits into and projects through a corresponding opening in the collar, substantiall y as and for the purpose hereinafter set forth. lt consists, further, in a register held in position against its seat or the collar by means of the pressure of the damper, substantially as is hereinafter shown. It consists, further, in the peculiar construction ofthe register, by means of which the same is combined with the damper, substantially' as is hereinafter specified. It consists, further, in a register and damper so constructed and combilled as that both may be operated by one crankhandle, substantially as is hereinafter shown. It consists, nally, in the combined register and damper as a whole, substantially as and for the purpose hereinafter set forth.

In the annexed drawing, A represents a section of stove-pipe, provided in and through one side thereof with a circular opening, through which is inserted from the interior a collar, B, having upon its inner edge a ange, b, that bears against the inner side of said pipe adjacent to said opening and prevents said collar from passing outward. The front side of the collar B is inclosed in the usual manner and provided within its face (l withtwo or more sector-shaped openings, D, and with a round central opening, c, for the reception of damper-crank, Snc., as is hereinafter explained. Fitted within the collar B, and resting against the inner side of the face or seat O, is a register, E, which corresponds in size and shape to said scat, and is provided with openings E similar to its sector-shaped openings D. A central hub or boss, F, corresponding in size and shape to the opening c within said seat, lits into the same and furnishes a bearing, upon which said register revolves, said revolutions being concentric to the circle of said seat. A round central opening, f, provided in and through the boss F, and two lugs, e, projecting horizontally inward from the inner face of the register upon either side of a radial line passing through the center of one of the openings, E', completes the register, which is held in position and operated by the hereinafter-described means. A damper, G, provided upon one side with 4a pointed pivoted bearing, g, and upon its opposite side with a second bearing, H, having nearly parallel sides and a shoulder, h, at its inner end, is placed in position within the pipe by passing the end of the bearing H through the opening within the register -and pressing together the sides of said pipe so as to increase its dimensions from front to rear until the rear pivot will pass freely downward to position, after which a slight blow from a wooden mallet upon the exterior of said pipe immediately over said conical pivot will indent the latter into the wall of the former so as to form a bearing for said pivot. In placing the damper in position its edge is inserted between the lugs e so as to loosely connect said damper to or with the register and cause them to maintain the relative positions shown in the drawing, one part being entirely closed when the other part is wholly open. In constructing the damper the distance between the end of the conical pivot g and the shoulder h of the bearing H is slightly greater than the distance between the inner face of the register at its center and the corresponding opposite portion of the pipe, so that when said damper is in position said pipe will be sufficiently distended to cause an inward pressure upon the bearings of said damper and hold the latter, the register and the collar, tirmly in place while at the saine time allowing` said damper and register to revolve with suiiicient freedom. The end ot' the ibrward bearing H, bein g prolonged and given the forni readily seen that those ot' other consti-notion may be employed Without changing the prineiple ot' operation. As an instaure ot' one inoditioation, Fig. 7 shows a damper, Gr, provided with hollow' bosses G', through which passa reddit, that torins the axial pivots upon which said damper revolves. By so constructing` the bosses G as that they Shall slightly distend the pipe it will be seen that the inward pressure of the hitter will not only hold said damper at any desired angle oi' adjust4 ment, but also will preserve the register and its collar in their relative positions upon or within said pipe. The special advantages obtained by this construction ot' the device are, tirst, the several parts are readily east and require no tit ting up before being combined and plat-ed within the pipe; second, the cost ofthe entire device is materially reduced by reason ofthe simplicity ot' its parts; and third, the combined damper can be more easily and quickly applied to a pipe than would be possible in eases where the eollaris inserted from without and held in position by rivets or other equivalent means.

Having thus fully set forth the nature and merits of my invention, what I claim asnew is-` 1. A register-collar fitted from within into an opening in a pipe, substantiallyv :s and for the purpose speoitied.

2. A register-collar fitted from within into an isn. i i i opening in a pipe and held in position by means of outward pressure, substantially as and for the purpose shown.

:3. In eombination with a register-collar provided with a central opening, a register having a central boss which corresponds to and tits into said opening', substantially as and for the pui pose set i'orth.

4. A register placed upon or against the inner side ot' the eollar and held in position by the outwa rd pressure ofthe damper, substantially as and t'or the purpose shown and described.

5. The register E provided with the central opening,` f. in oouibination with the damper Gr provided with the axial bearingr H, substantially as and tor the purpose specified.

(i. In oonibination with the register E and daniper the lugs e, substantially as and for the purpose shown.

T. In combination with the register E and damper G, the crank L, connected with and operating` both ot' said parts, substantially as set forth.

e). The herenibetore-described device as a whole, consisting,T ot' the collar B provided with the face or seat C, openings I) and o, and nange b, the register E provided with the boss F, Central opening` j'. and lugs e, the damper G provided with the bearings g and Hand the crank L, when the several parts are constructed as shown, and coinbined with each other and with the pipe, substantially as and for the purpose speoiiied.

In testimony that I claim the toregoing I have hereunto set my hand this 7th day of October,

WILLIAM J. KEEP. Witnesse CHARLES H. VAN ARNAM,

UHAs. H. HAZARD. (154) 

